No idea where the entrance might be, they may just reuse Tam-Tara or Toto-Rak.

I'm more interested in the potential "final" boss... Edda, right? She fell into a bottomless pit and now we're entering an bottomless dungeon... Still, I secretly hope a new Primal/Voidsent might be sitting around there... Ivalice Espers are getting an infuriatingly odd handling (some are Primals, others are Voidsent... ARGH!), but with Cu being a Voidsent in Void Ark, I expect Exodus to get similar treatment now... My previous theory was that the Allag called the Twelveswood the Forest of Moore, and since they sealed away lots of Primals, Exodus might be sealed away there... Yay FFV references! Lets just change that to the old Gelmorran/Amdapori name for the Twelveswood was the Forest of Moore, and somewhere in this dungeon Exodus is waiting...

Oh, and because the progression system seems to take a leaf from Nyzul Isle, and the stats system seems to take a leaf from Salvage, I'm half expecting Einherjar to worm its way in there... This palace is in the Twelveswood, where Odin likes to stomp around...